Turbidity detection device based on double-sensor calibration

Abstract

The turbidity detection device is characterized in that a detection module is additionally arranged at a laser light source module, laser of a light source is divided into two light paths in the vertical direction through a light splitting piece, the first light path enters a circulating groove, the second light path enters a second detection module through a light filtering film, and the second detection module is connected with the light splitting piece. The second detection module can detect the change condition of the laser light source under the environment, aging or other factors, and parameters can be provided for compensation of detection numerical data of the first detection module according to detection data of the second detection module.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality analysis, and more specifically, mainly relates to a turbidity detection device based on dual-sensor calibration. Background Art

[0002] Turbidity is a key component in water quality testing. Turbidity measurement methods are generally categorized as nephelometry, visual turbidimetry, and spectrophotometry. Of these three methods, nephelometry is widely used for water turbidity measurement due to its rapid measurement and ease of use. It uses a specific light source to illuminate the water sample, and a sensor at a 90-degree angle receives the scattered light. When a water sample contains varying levels of insoluble particulates, the scattered light exhibits varying intensities. A photoelectric sensor detects the scattered light and converts it into an electrical signal, which can be used to derive the turbidity value. However, the laser light source required for nephelometry is affected by various environmental factors—temperature, humidity, electromagnetic interference, and mechanical vibration—as well as internal factors—thermal expansion, loosening, aging of optical components, and optical path adjustments. This can lead to unstable laser light output, thus affecting the appearance of scattered light. This can lead to significant deviations in test results, reducing the accuracy and stability of the data. Therefore, further improvements in turbidity measurement are needed. Utility Model Content

[0003] The purpose of the present invention is to address the above-mentioned shortcomings and provide a turbidity detection device based on dual sensor calibration, so as to solve the technical problems in the prior art such as turbidity detection being easily affected by environmental changes and affecting detection accuracy.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The utility model provides a turbidity detection device based on dual sensor calibration, comprising a main body shell, a water inlet, a sewage outlet, an incident port, and a detection port are provided on the wall of the main body shell, and a flow slot is provided on the upper side of the main body shell through a cover plate pressing a sealing ring;

[0006] A light trap partition disposed in the middle of the flow channel to divide the flow channel;

[0007] A detection module 1 provided on the detection port;

[0008] A laser light source module is provided on the incident port, a calibration port is provided on the front side of the laser light source module, and a beam splitter is provided inside the laser light source module at the calibration port;

[0009] A second detection module provided on the calibration port;

[0010] The detection module 1, the detection module 2 and the laser light source module are electrically connected to an external control system via wires.

[0011] Furthermore, the laser light source module includes a light source main bracket, a light source bracket arranged in the light source main bracket, a laser light source arranged in the light source bracket, a pressing piece arranged at the rear end of the laser light source, a calibration port arranged on the side of the front section of the light source main bracket, and a filter film arranged on the calibration port;

[0012] The top of the light source bracket extends to the calibration port and is provided with a spectrometer. A quartz lens is provided on the top of the front end of the main light source bracket. The pressing plate is electrically connected to the external control system through a wire. The laser light source divides the laser into two light paths in the vertical direction through the spectrometer. Light path one is incident on the flow slot, and light path two is incident on detection module two through the filter membrane.

[0013] Furthermore, an overflow port is provided on the upper portion of the main body shell wall.

[0014] Furthermore, the detection module 1 and the detection module 2 are both photoelectric sensor detection modules.

[0015] Furthermore, the photoelectric sensor detection module includes a PCBA bracket, which is pressed by a PCBA cover to press the rubber pad and then press the PCBA board fixedly set at the upper center of the PCBA bracket, a sealing joint set at the upper center of the PCBA cover, a lens set at the bottom center of the PCBA bracket, and a sealing gasket set on the outer circle of the bottom of the PCBA bracket. The PCBA board is electrically connected to the external control system through a wire passing through the sealing joint.

[0016] Furthermore, the light trap partition is provided with groove holes corresponding to the light path for light to pass through.

[0017] Furthermore, a spherical depression is provided on the inner wall of the main body shell, the position of which corresponds to the groove hole of the light trap partition.

[0018] Furthermore, the inner wall of the main body shell, the surface of the light trap partition, and the inner wall of the optical path channel of the laser light source module are all provided with a light absorbing layer.

[0019] Compared with the prior art, the beneficial effects of the present invention are: a detection module is added to the laser light source module, and the light source is divided into two light paths in the vertical direction through a beam splitter. Light path one is incident on the flow slot, and light path two is incident on detection module two through a filter membrane. Detection module two can detect changes in the laser light source due to environment, aging or other factors, and can provide parameters for compensating the detection numerical data of detection module one based on the detection data of detection module two. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a turbidity detection device based on dual sensor calibration in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the disassembly of a turbidity detection device based on dual-sensor calibration in an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the disassembly of the photoelectric sensor detection module in the embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of the main body shell in an embodiment of the present utility model.

[0024] The following are the descriptions of the reference numerals:

[0025] 1 is the main shell, 101 is the spherical depression, 2 is the water inlet, 3 is the sewage outlet, 4 is the incident port, 5 is the detection port, 6 is the cover plate, 7 is the sealing ring, 8 is the flow slot, 9 is the light trap partition, 901 is the groove hole, 10 is the detection module 1, 11 is the laser light source module, 12 is the detection module 2, 13 is the overflow port, 1101 is the calibration port, 1102 is the spectrometer, 1103 is the main light source bracket, 1104 is the light source bracket, 1105 is the laser light source, 1106 is the pressing plate, 1107 is the filter membrane, 1108 is the quartz lens, 1401 is the PCBA bracket, 1402 is the PCBA pressure cover, 1403 is the rubber pad, 1404 is the PCBA board, 1405 is the sealing joint, 1406 is the lens, and 1407 is the sealing gasket. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] refer to Figure 1 、 Figure 2 As shown, the embodiment of the present invention is a turbidity detection device based on dual sensor calibration, comprising a main body shell 1, on the wall of which are provided a water inlet 2, a sewage outlet 3, an incident port 4, and a detection port 5. A flow slot 8 is provided on the upper side of the main body shell 1 through a cover plate 6 pressing a sealing ring 7;

[0028] A light trap partition 9 is provided in the middle of the flow slot 8 to divide the flow slot 8;

[0029] A detection module 10 provided on the detection port 5;

[0030] The laser light source module 11 is provided on the incident port 4, and a calibration port 1101 is provided on the front side of the laser light source module 11. A beam splitter 1102 is provided inside the laser light source module 11 at the calibration port 1101.

[0031] A detection module 2 12 provided on the calibration port 1101;

[0032] The detection module 1 10, the detection module 2 12, and the laser light source module 11 are electrically connected to the external control system via wires;

[0033] In this design, a detection module is added to the laser light source module 11, and the light source is divided into two light paths in the vertical direction through the beam splitter 1102. Light path one is incident on the flow slot 8, and light path two is incident on the detection module 2 12. The detection module 2 12 can detect changes in the laser light source due to the environment, aging or other factors. According to the detection data of the detection module 2 12, data compensation can be made for the detection value of the detection module 10 to increase the accuracy of the detection. At the same time, it can also be applied to more detection environments.

[0034] In a preferred embodiment, the laser light source module 11 includes a main light source support 1103, a light source support 1104 disposed within the main light source support 1103, a laser light source 1105 disposed within the light source support 1104, a pressing piece 1106 disposed at the rear end of the laser light source 1105, a calibration port 1101 disposed on the side of the front section of the main light source support 1103, and a filter film 1107 disposed on the calibration port 1101.

[0035] The top of the light source bracket 1104 extends to the calibration port 1101 and is provided with a spectrometer 1102. A quartz lens 1108 is provided at the top of the front end of the main light source bracket 1103. The pressing plate 1106 is electrically connected to the external control system through a wire. The laser light source 1105 divides the laser into two light paths in the vertical direction through the spectrometer 1102. Light path one is incident on the circulation slot 8, and light path two is incident on the detection module 2 through the filter film 1107.

[0036] In a preferred embodiment, an overflow port 13 is provided on the upper portion of the wall of the main body shell 1, and water will overflow naturally when it reaches a certain water level.

[0037] In a preferred embodiment, both the detection module 1 10 and the detection module 2 12 are photoelectric sensor detection modules, which can be commonly used detection devices on the market.

[0038] A preferred embodiment is to refer to Figure 3 As shown, the photoelectric sensor detection module includes a PCBA bracket 1401, a PCBA cover 1402 that presses a rubber pad 1403 and then presses a PCBA board 1404 fixedly set at the center upper part of the PCBA bracket 1401, a sealing joint 1405 set at the center upper part of the PCBA cover 1402, a lens 1406 set at the center bottom of the PCBA bracket 1401, and a sealing gasket 1407 set on the outer ring of the bottom of the PCBA bracket 1401. The PCBA board 1404 is electrically connected to the external control system through a wire passing through the sealing joint.

[0039] In a preferred embodiment, a groove hole 901 for light to pass through is provided on the light trap partition 9 corresponding to the light path. The groove hole 901 is a conical bottom opening, which can reduce the generation of bubbles while ensuring the light absorption effect, and is also convenient for cleaning.

[0040] A preferred embodiment is to refer to Figure 4 As shown, a spherical depression 101 is provided on the inner wall of the main shell 1, the position of which corresponds to the groove hole 901 of the light trap partition 9, which can reduce the back reflection of laser light through the light trap partition 9 and reduce the influence of stray light on the detection module 10.

[0041] In a preferred embodiment, the inner wall of the main body shell 1, the surface of the light trap partition 9, and the inner wall of the optical path of the laser light source module 11 are all provided with a light absorbing layer, which can effectively reduce the interference of stray light on the detection module.

[0042] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as being included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also fall within the scope of the present invention.

[0043] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or arrangement of the subject combination arrangement. In addition to variations and modifications to the components and / or arrangement, other uses will also be apparent to those skilled in the art.

Claims

1. A turbidity detection device based on dual sensor calibration, characterized in that: It includes a main body shell, the main body shell wall is provided with a water inlet, a sewage outlet, an incident port, and a detection port, and the upper side of the main body shell is provided with a flow groove by pressing a sealing ring with a cover plate; A light trap partition disposed in the middle of the flow channel to divide the flow channel; A detection module 1 provided on the detection port; A laser light source module is provided on the incident port, a calibration port is provided on the front side of the laser light source module, and a beam splitter is provided inside the laser light source module at the calibration port; A second detection module provided on the calibration port; The detection module 1, the detection module 2 and the laser light source module are electrically connected to an external control system via wires.

2. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: The laser light source module includes a light source main bracket, a light source bracket arranged in the light source main bracket, a laser light source arranged in the light source bracket, a pressing piece arranged at the rear end of the laser light source, a calibration port arranged on the side of the front end of the light source main bracket, and a filter film arranged on the calibration port; The top of the light source bracket extends to the calibration port and is provided with a spectrometer. A quartz lens is provided on the top of the front end of the main light source bracket. The pressing plate is electrically connected to the external control system through a wire. The laser light source divides the laser into two light paths in the vertical direction through the spectrometer. Light path one is incident on the flow slot, and light path two is incident on detection module two through the filter membrane.

3. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: An overflow port is provided on the upper portion of the main body shell wall.

4. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: The detection module 1 and the detection module 2 are both photoelectric sensor detection modules.

5. The turbidity detection device based on dual sensor calibration according to claim 4, characterized in that: The photoelectric sensor detection module includes a PCBA bracket, a PCBA cover that presses a rubber pad and then presses a PCBA board fixedly arranged at the upper center of the PCBA bracket, a sealing joint arranged at the upper center of the PCBA cover, a lens arranged at the bottom center of the PCBA bracket, and a sealing gasket arranged at the outer ring of the bottom of the PCBA bracket. The PCBA board is electrically connected to the external control system through a wire passing through the sealing joint.

6. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: The light trap partition is provided with groove holes corresponding to the light path for light to pass through.

7. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: The inner wall of the main body shell is provided with a spherical depression whose position corresponds to the groove hole of the light trap partition.

8. The turbidity detection device based on dual sensor calibration according to claim 1, characterized in that: The inner wall of the main body shell, the surface of the light trap partition, and the inner wall of the optical path channel of the laser light source module are all provided with a light absorbing layer.

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